Pregnant Marisa Miller poses nude for PETA

NORFOLK, Va., May 5 (UPI) -- Marisa Miller is posing nude in PETA's new campaign to show her support for animals in captivity.

The pregnant model is mimicking the environment of Orkas who are trapped in small enclosures by baring her baby belly and laying in a bathtub naked for the ad.

Miller told People, "I've always been an animal lover and I do a lot with ocean conservation, I always see dolphins when I surf, but I didn't have the knowledge about how they are acquired. When Blackfish came out, I saw it and I was so upset."

At the top of the newly released photo from the animal-rights group, it says: "SeaWorld: Separating mothers and babies since 1970."

Already a mother to son Gavin Lee, 2, she says that title gave her a different perspective on how animals are really treated.

"I was so unaware of the realities about how the whales are captured, how they are separated and their emotional capacity. This is an animal whose babies never leave their mother's side their whole life," she says. "So as a mother, I have a totally different perspective on relating to that."

This is not the first time the former Victoria's Secret model posed nude while rocking a bump. Back during her first pregnancy in 2012, she posed for Allure magazine.